I'm having the same problem in Windows 7. I think it started with Firefox 3.6.4, I didn't see it prior to that.

any fix to this yet?

Im Having the same problem, very annoying.. (win 7, firefox 3.6.6)

You may have installed a persona or theme that made those changes.

You can uninstall that Persona and revert to the Default theme (Tools > Add-ons > Themes). See Use themes to change the look of Firefox and http://kb.mozillazine.org/Themes (Lightweight theme)

It finally happened again. I just noticed that other windows opened by Firefox are still the correct color, it's just the main window that has this problem.

Here's the screenshot.

using default theme same prob

problem is the same even with other themes-- ie all themes use the baby blue border changing the main windows theme does not affect it either

I have the same problem and I have noticed that the size of the max/min/close buttons also changes when this happens. You can see this in the screenshot that Rusty posted on 7/9.

Any updates on this problem yet? It doesn't cause any loss of browser functionality, but it is very annoying.

so far, no comments from mozilla developers team... The issue remains the same It is so annoying that I´m using win XP again...

I think your problem has less to do with firefox and more to do with your appearance settings, try this.

On vista

Type "sysdm.cpl" in the start search bar

Click "Advanced" tab

Click "Settings" in the Performance section

In the Visual Effects tab select "Adjust for best Appearance"

Click "Ok"

Now go test it out. My guess is windows is switching Aero off to save system resources.

Hope this helps

I tried this, but the problem still exists. I pretty much expected this, because the only window that ever shows this problem is Firefox (and particularly the Firefox window that has had focus for a very long time). I'm pretty sure that it doesn't have anything to do with Windows Aero appearance settings. The time to failure is really strange also . . . I have tried to determine if it happens after returning from the screen saver, or returning from S3, but it doesn't seem to be tied to either of those events. It just seems to happen after x amount of time that the browser window is open. (I am not obsessed with it enough to have tried to figure out what x is : )

For what it's worth, I'm seeing this problem on multiple systems that are running Windows 7, not Vista. Again, it's more of an annoyance than anything else, but it does seem to be associated with the Firefox browser window that has focus.

Hope this helps.

Upgraded recently to Firefox 3.6.7, still having the same problem (running Vista).

My custom themes look poxy with a baby blue border, please change it back !

I have the same problem using vista and firefox 3.6.8 I don't remember the version that I had before cause I formatted my computer. Any solution yet?

It happens to me after I resize the window. More specifically, I've noticed that it happens after resizing the window using the EasyWindowDragKDE autohotkey script.